Variable-speed mechanism for metal-working machines.



J. HARINESS.

VARIABLE SPEED MECHANISM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 7, 1911v Patented Mar. 17, 1914.

6 SHEETSSHEET 1.

J. HARTNESS. VARIABLE SPEED MECHANISM FOR METAL WORKING MACHINES.

A PPLIOATION FILED SEPT. 7, 1911.

Patented Mar. 17, 1914.

6 SHEETS-SHEET 2.

[71/ Us 71, to 7'.

Q/dnes WWW J. HARTNESS.

VARIABLE SPEED MECHANISM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 7, 1911.

1,090,300, Patented Mar. 17, 1914.

6 BHEETBSHBET 3.

7/09 0 fn'uenzfa 21" 102i fivtaoses 0,4, pf; 81. 14mm Patented Mar. 17,1914.

8 SHEETS-SHEET 4.

J. HARTNESS.

APPLICATION FILED SEPT. 7, 1911.

1 J 1 1 72% Z W u 10 Q am 9 u ,1: WV Q Wx w 8 Q 1 mm %%W M 19 u m U flH. n 4K 09 R 1 Q N mg m m m9 wm l x E h u 6 m. m J W R 1 E m H m M l L rz W n no: 3 8 g L oww w E w w w m M 1 A? W "m h \ub M 1 S1 & NW1

VARIABLE SPEED MECHANISM FOR METAL WORKING MACHINES.

J. HARTNESS.

VARIABLE SPEED MEGHANISM FOB METAL WORKING MACHINES.

APPLICATION FILED SEPT. 7, 1911.

Patented Mar. 17, 1914.

6 BHEETB-SHEET 6.

J. HARTNESS. v

VARIABLE SPEED MECHANISM FOR METAL WORKING MACHINES.

APPLICATION FILED SEPT. 7, 1911.

1,090,300. Patented Mar. 17, 1914.

6 SHEETS-SHEBT 6.

"II H 1 2 III i I x I I if] (Z39 r5 62 6 33 26 82 I, w 1' d I j w 6L I oj g 2y J l 2 .60,

witnesses. I veniq-z p' q. I

ENT FF1C.

JAMES HARTNESS, OF SPRINGFIELD, VERMONT.

' t VARIABLE-SPEED MECHANISM FOR METAL-WORKIN G MACHINES.

To all whom it may concern.

Be it known that I, JAMES HARTNnss, a citizen of the United States, andresident of Springfield, in the county of \Vindsor and State of Vermont,have invented certain new and useful Improvements in Variable- SpeedMechanism for Metal-Working Machines, of which the following is aspecification.

This invention has relation to metalworking machines, and while it isespecially designed for employment in connection with lathes,nevertheless it is applicable for use in connection with various otherforms of machines in which it is desired to vary the speed of the drivenelement.

In metal-working machines such as turret lathes there is a tool carrierwhich is fed lengthwise of the bed by power driven mechanism, and insome of them a work carriage fed crosswise on the bed by similarmechanism. The mechanism for effecting the movement of these carriagesconsists of gearing and clutches so constructed that by shifting theclutches the carriages may be driven at any one of several differentspeeds. It is commonly necessary for the operator of such machines toconsult speed tables,

which are usually aflixed to the machine, so'

as to set the clutches to secure the desired speed of the carriage. Thisis a matter which requires considerable judgment on the part of theoperator and occasionally requires the expenditure of much time inadjusting the mechanism to secure the desired end.

The object of the present invention is to eliminate to a large extentthe work of the operator in adjusting the clutches of the speed-changingmechanism and to simplify this operation. To this end I provide asuitable Variable speed gearing having the requisite number of clutchesor change gears so that the driven element may be moved at any one of anumber of speeds, and in con nection therewith I provide a selectormechanism including a selector which controls the clutches or changegears and which may be moved to any predetermined position so as torender active the particular train of gearing to secure the desiredspeed.

The invention further includes numerous improvements which areillustrated upon the drawings which I will subsequently explain.

Referring to said drawings: Figure 1 Specification of Letters Patent.

Application filed September 7, 1911.

Patented Mar. 17, 1914. Serial No. 648,168.

represents in side elevation a. portion of a metal-working latheequipped with my invention. Fig. 2 represents a horizontal sectionthrough the same immediately below the work carriage. Fig. 3 representsa section through the variable-speed gearing on the line 33 of Fig. 2.Fig. 1 represents a horizontal section through the selector mechanism.Fig. 4t represents an end elevation of the head of the machine. Fig. 1represents a plan view of the friction-control mechanism for the feed.shafts. Fig. 4: represents a section on the line CC of Fig. 1 Fig. 5represents a horizontal section through the s cod-changing mechanism andthe shafts w llCll effect the movement of the work carriage and the toolcarriage. This view is practically a development of the gearing ondifferent planes. Fig. 6 illustrates the connections between theclutches of the variable-speed gearing and the selector mechanism. Fig.7 is an enlarged sectional view of the selector mechanism illustrated inFig. 6. Fig. 8 represents a section on the line 88 of Fig. l andillustrates a part of the mechanism on the front of the bed. Fig. 9illustrates the connection between the selector mechanism and one of thedisk clutches for disconnecting the variablespeed mechanism for thecarriage-driving shafts when the selector is being adjusted. Fig. 10represents a plan view of the selector mechanism. Fig. 11 represents asection through the selector mechanism, and shows the selector in.inactive position. Fig. 11 represents a longitudinal section through oneof the carriage-moving shafts to show the disk clutch. Figs. 12 and 13are sectional detail views illustrating a portion of the same mechanismas that shown in Fig. 9. Figs. 14 to illustrate one of the cam shafts orrockers forming a part of the selector mechanism, Figs. 19, 20, 21 and22 illustrating respective sections on the lines 19--19, 2020, 2l.21 and22-22 of Fig. 14.

Figs. 23 to 30' inclusive illustrate the other cam shaft or rocker whichforms apart of the selector mechanism, Figs. 28, 29 and 30 beingsections on the lines 282S, 29--29, and 30-30 of Fig. 24. p

The same reference characters indicate the same or similar partswherever they occur.

Before proceeding to a detailed description of the machine which I haveillustrated on the drawings, I desire to have it understood that saidmachine constitutes only one embodiment of the invention and that theinvention is not limited to its application to a machine of thischaracter, but may be.

utilized in various machines of widely differing design and foraccomplishing widely difierent purposes.

I also desire to have it understood that the various details of themechanism which I shall explain may be changed without departing fromthe spirit and scope of the invention, and further that the phraseologyor which is mounted to slide a tool carriage having a rotatable turretthereon substantially as shown in the said Letters Patent. At the end ofthe machine there is a transversely movable head or work carriage 41provided with one or more work spindles as illustrated in the co-pendingapplication of George A. Perry and myself Serial No.

v 648,147 filed September 7, 1911. The work carriage is provided on itsunder side with a nut 42 which projects downwardly into the bed and isengaged by a feed screw 43 j ournaled in the bed and having a forwardlyprojecting end 43 equipped with a handle 44 by which it may be rotatedto feed the work carriage transversely of the bed. The tool carriage(which is not shown) is fed longitudinally of the bed either by hand orby means of a shaft 45 shown in Figs. 1 and 2. Either the shaft 45 orthe shaft 43 may constitute what I term a driven element, the speed ofwhich it is desired to control. The initial driving element or memberconsists in the present instance of a shaft 46 to which power is appliedthrough the medium of a pulley 47 secured thereon. In the presentembodiment of the invention the shaft 46, as illustrated in Figs. 1, 2and 5, is journaled in a box in the bed, and power is applied to thepulley 47 by means of a belt driven from any convenient source of power,as from a shaft on the work carriage.

From the shaft 46 power is transmitted to the driven shafts 43 and 45 torotate said shafts at any one of a predetermined number of speeds. Theshaft 43 is provided with a worm wheel 48 which may be engaged anddriven by a worm 49 (Figs. 2 and 5) secured upon a shaft 50 arrangedapprom'mately in parallelism with that at 45. The shaft 45 consists oftwo sections, having a universal joint connection for purposes notconnected with the present invention. The two shafts 45 and 50 aregeared together by gears indicated at 51, 52, respectively intermeshingwith an inter mediate idler gear 53 journaled on a stud shaft 54 in thewall of the bed, as shown .in Fig. 5, so that the two shafts are rotatedpresent embodiment of the. invention ins eludes change or slip gears, islocated in a box 55 in the bed, and the shaft 46 ex.-

tends into the said box, as illustrated in Figs. 2 and 5. Thevariable-speed mechanism includes a shaft 56 journaled in bearings inthe box and projecting through the side wall of the box, and anintermediate shaft 57 likewise journaled in bearings in the box. Theprojecting end of the shaft 56 has secured thereon a gear 58 whichintermeshes with and drives the gear 51 on the shaft 45. On theintermediate shaft 57 are rigidly secured a set of what may be termedthe fixed gears 59, 60, 61 and 62, of different diameters, and splinedon the shaft 46 is a set of change gears comprising the three drivinggears 65, 63 and 64, all formed on the same ,hub and adapted tointermesh respectively with the gears 62, 59 and 60 according to theposition to which the change-driving gears are moved to secure threevariations in the speed of the shaft 57. They are moved longitudinallyupon the shaft 46 by an arm 66 secured upon a cross rock-shaft 72 andhaving a finger 66 projecting into a'peripheral groove formed in the hubof the driving change gears (see Figs. 2 and 3). Splined on the shaft 56is a set of change gears comprising the driven gears 67, 68 and 69, ofdifferent diameters, adapted to intermesh respectively with the gears59,60 and 61, according to the position occupied by the driven changegears. These last mentioned gears 67, 68 and 69, are all formed on thesame hub, which is moved longitudinally of the shaft 56 by an arm 70having a pin or projection 70 entering a peripheral groove on said hub.The arm 70 is formed on or secured to a shaft 71 parallel with that at72, said shafts 71- and 72 projecting through the front wall of the box,as shown in Fig. 2, and being provided respectively on their projectingends with arms 73, 74. The arm 73 depends from the shaft 71, whereas thearm 74 projects upward therefrom as shown in Fig. 6.

By rocking the shafts 71 and 72 (which may be considered as gearcontrollers or 'members for putting the several trains in condition foroperation) in one direction or the other, the driving and driven changegears may be adjusted to cause the shaft 56 to be driven at any one ofnine speeds, as

. nation, since the driving change gears may be adjusted to any one ofthree positions and the driven change gears may be likewise adjusted toany one of three different positions. As a result of this construction,power may be transmitted fro-m the driving element 46 to the drivenelements 415 and 43 to secure nine variations in the speed of retationthereof. By varying the number of trains of gears forming the variablespeed gearing I may secure a larger or smaller number of variations, butI find that for all practical purposes, particularly in connection withmetal-turning machines, nine speeds are sufficient. Heretofore in changespeed gearings it has been the custom to ad just each train or set ofchange gears by hand, independently of the other, and consequently to dothis, it has heretofore been necessary to consult a speed table, withwhich the machine is supplied, to get the proper combinations of gears.

In accordance with the present invention I employ selector mechanism foractuating the gear controllers by which the change gears may be moved toany selected position to condition for operation any particular trainand thereby to secure the desired speed of the driven element. Thisselector mechanism is connected with the rock-shafts 71 and 72, as willbe now explained.

Pivotally connected with the two'arms 73 and 74 are two connecting rods75, 76, hav ing notched ends adapted to engage pins 77, 78, projectingfrom the arms 73, 74, as shown in Fig. 6. For convenience these two rodsare arranged one above the other and they are pivotally connected tostuds 79 and 80 projecting laterally from arms 81, 82, formed on two camshafts or cam rockers in-- dicated as a whole at 83, 84, as shown inFigs. l, 6, 7, 18 and 27. These cam shafts or cam rockers are arran edin parallelism and their ends are journal ed in a casing 85 locatedbehind the front wall of the bed. This casing is hung on a bar 86 whichprojects through the wall of the bed and is also sup ported by a bar 87which projects through hubs formed on the ends of the casing. The saidbar, as shown in Fig. 8, extends through the front and rear walls of thebed, and it serves another purpose, as will be presently explained. Byrocking the cam shafts or rockers in one direction or the other theconnecting rods 75, 76, may be moved lengthwise to rock the shafts 71,72, to vary the positions of the change gears. Inasmuch as each set ofchange gears is movable into three different positions, the cam rockersmust be not only rotatively adjusted or moved to occupy three differentpositions, but they must be also moved into nine different positionsrelatively to each other, and consequently to accomplish this each ofthe rockers is provided with nine corresponding faces, which forconvenience I call cam faces.

By Figs. 23 to 30 inclusive it will be seen that the cam rocker 83 iscut away to provide plane diametrical faces a, b, c, d, e, f, g, h, andz',those at a, b, 0 being in the same plane, those at (Z, f and h inanother plane at an angle of 30 degrees'to the faces a, Z), and 0, andthose at e, g and i at an angle of 60 degrees to the faces (Z, f and hand at an angle of 30 degrees to faces a, b and 0. By referring to Figs.14 to 22 inclusive,

it will be noted that the rocker 84 has diametrical. plane faces a b 0,(Z 6, f 9 [L1, and 2' equal in number to those on the rocker 83 andarranged in the order named. The faces 72 f and 9 are all in the sameplane; the faces a (Z and e, are in another the top side of the rocker,and those. on the rocker 83 are on the under side, and with the faces ata to z, opposite those at a to 2', so that there are nine pairs ofcorresponding faces.

I have stated that passing through the easing 85 there is a bar 87. Thisbar is adapted to be moved lengthwise, and to it is rigidly keyed atwo-armed lever 88, the arms of which are respectively indicated at 88and 88*. These arms are curved for convenience, and on the ends thereofare flat faces 88, 88 which are parallel. These arms are relativelynarrow so that the end of each will engage only one cam'face on theadjacent rocker. The bar 87 is located between the rockers with its axisinthe plane of the axes of the rockers, as shown in Fig. 7, and may berotated to disengage the arms 88 88 from the rockers, and then movedlengthwise to bring the arms into registration with any pair ofconfronting cam faces on the two rockers. When the two-armed lever isbrought into registration with any two corresponding faces of the tworockers, the bar may be rotated tobring the ends of the arms into firmengagement with said faces, whereby the rockers will be rocked on theiraxes in one direction or the other to shift the connecting rods 75, 76,and thereby move the change gears (or clutches, if clutches be Q 67, 68and 69 will remain stationary, and the change gears 65, 63, and 64, willbe caused to intermesh successively with the gears 62, 59 and 60 on theintermediate shaft 57 to cause successive increases in speed in j thedriven member, at this time the low gear actuation the change gears tosecure the desired speed of the driven element, I would not consider ita departure from my invention if the cam faces were formed on theselector instead of on the rockers.

I will now explain the mechanism by which the selector is adjusted inposition and rocked to move the rockers about their axes. Referring toFigs. 1, 2, 4, 8, 9 and 12, it

will be seen that on the forwardly 1projecting end of the shaft 87 thereis a s eeve or hub 90 to which the bar 87 is splined, as indicated at 91in Fig. 4, so that while the bar' 87 may be moved endwi se withreference to the sleeve it will be caused to oscillate there with. Byany convenient means the sleeve is held against axial movement, as forinstance by a rib 92, engaged with a block 93 secured to the front'sideof the bed. The sleeve 90 at its outer end is laterally extended to forma bearing for anarm or controller 94 which is located therein, theprojecting end of which is formed as a'handle so that it'may be manuallyrotated. This arm may be swung about one axis to move the sleeve aboutsaid axis, as shown in Figs. 9 and 12; but it is also provided withapinion 95 engaged with rack teeth 96 on the bar shaft 87 so thatbyrotating the arm 94 on its longitudinal axis "the 'bar ,87, maybelmov'ed --lengthwise of the rockers' to set the selector inregistration with" any pair of cam faces.

' Secured upon thearm941s a dial or disk 97 which is affixed theretosojasto rotate therewith, and said dial has nine segments formed by nineequally spaced radial slots 97", any one? of which slots may be broughtinto en? gagement and registration with a pin 98 de- ..pending from thebar 86which projects for ward from the bed and assists in supportingBetween the slots the dial bears upon its face numerals indicating thespeeds of travel of the carriage, expressed in terms of revolution ofthe work per inch of travel of the carriage, which speeds may be securedby the variable speed gearing. The rack teeth on the bar 87 and thepinion 95 are in such ratio so that nine-tenths of one complete r0-tation of the controller and disk will cause the selector to be advancedthroughout its entire length of travel, and to register successivelywith all the cam faces on the rockers. On the sleeve 90 there is anindex pin 99 close to the periphery of the disk, so that when the middleof any one of the segments of the disk. bearing the numeral of thedesired speed registers with the pin, the proper 'slot will be inalinement with the ,pin 98.

In practice, to set the selector, the arm 94 is swung about istransverse axis from the position shown in Fig. 12 to the position shownin Fig. 9; then the arm 94 is rotated about its longitudinal axis in onedirection or the other until the numeral indicating the I 12' to causethe disk to be engaged with the pin 98 in the proper slot. This locksthe gear 95 against rotation. As the. arm 95 is swung upward, the endsof the selector engage the cam faces with. which it reglsters and rocksthe cam rockers, whereby through the connections/between said rockersand the change gears, said gears will be shifted to the correspondingpositions to transmit the indicated-speed to the driven element. Thus Iprovide a controller for adjustin the-selector to the desired position,looking it in that position and actuating the selector to vary theposition of the change gears and .thereby secure a variation in thespeed of the driven parts.

In order that the variable speed gearing may be relieved of its load bybeing disconnected from the driven parts or elements when the selectoris being adjusted and actuated, I provide means by which this may beaccomplished. Referring to Figs. 5 4 and 4 and 11, it will be seen thatthe two gears 51 and 52 on the shafts 45 and 50 are connected with thesaid shafts by friction 'disk clutches indicated as a whole at 100 and101. As the construction of such clutches is well known, I willnotdescribe them in de: tail. The clutches are normally active, be ingmaintained in that condition by devices which are similar in the twoshafts, so that I shall explain only one of them. This device consistsof a rod 102 located in an aperture in the shaft and having a cross pinclutch and compress the disks into frictional engagement. The rod 102 isheld in its active position by a spring 104 which encircles iae 103 toengage the movable element of the use nooe soo 'back and forth by a rockshaft 108 which is arranged horizontally and projects to the front ofthe bed as shown in Figs. 2, 4, 4",

4, 5 and 9. The outer end of the shaft is loosely journaled in an ear109 on the end of the bed and its inner end is journaled in a boss 106on the hub of the cross head. On the inner extremity of the shaft 108there is a crank pin or eccentric 108 which takes into a groove 54 inthe stud shaft 54, so that, when the rock shaft 108is rocked, the crosshead will be moved longitudinally upon the stud shaft 54; The rock shaftis held in place by a screw. pin 108 taking into a peripheral groove insaid shaft as clearly shown in Fig. 4. On its front end said rock shaft108 has a downwardly projecting arm 110 to which is pivoted a connectingrod 111 extending along the front side of the bed, as shown in Fig. 1,and at its righthand end passing through an aperture in the block 93 towhich I have previously referred as being attached to the front side ofthe bed adjacent the selector-actuating mechanism. The sleeve 90 isformed with a cam projection 112 (see Fig. 13) extending downwardly inproximity to'the end of the connecting rod 111 so that when the arm 94is rocked downwardly to the position shown in Fig. 9 the cam 112 willengage the rod 111 and move it to the left to rock the shaft 108 andmove the cross head to the right, thereby releasing the disk clutchesand permitting the gears 51 and 52 to run idly on their re spectiveshafts 45 and 50 whereby the driven shafts will no longer receive powerfrom the variable speed gearing. To hold the cross head in this positionuntil the selector has been adjusted, the block 93 is provided with apawl 114 which rests upon the'top of the connecting rod 111 and isadapted to drop into a notch formed therein, 'as shown in Fig. 9. Thisholds the cross head in the position into which is was moved byengagement of the cam 112 with the connecting rod 111. The pawl isdisengaged from the connecting rod when the arm 94 is returned toupright position, by a pin 115 on the rib 92 of the sleeve 90, as shownin Fig. 13. As soon as the pawl is disengaged from the connecting rod,the springs 104-in the shafts'4-5 and 50 restore the friction-diskclutches to of power from the variable speed gearing .to the shafts 45and 43.

These persons who are skilled in the art to which this invention relateswill perceive the advantages flowing from the construction which I havedescribed. As previously indicated, it enables an ,operator with thegreatest rapidity to change the speed of the driven part of the machineto any other desired speed, the single controller 45 serving not only toadjust the selector to the desired position but also serving through themedium of the sleeve and the shaft 87 to rock the selector into positiveengagement with the cam faces on the rockers and oscillate the rockersto shift the change gearing. Incidental to the particular mechanismwhich I have described, the speed of both the tool carriage and the workcarriage is varied by the same operation of the selecting andgearshifting mechanism.

In employing the term members or devices for putting the trains of gearsin condition for operation, I refer, in the specific embodiment of theinvention, to the levers which slide the change gears to place anyparticular train of gears in position or relation to transmit power fromthe driving element to the driven element, but I mean thereby to includeany mechanism such. as clutch controllers which perform anequivalentfunction in operating clutches to clutch into power transmitting andreceiving relation any particular train of gears in a variable speedpower transmitting mechanism. In the particular embodiment of theinvention illustrated and described herein, each of the said devices ormembers controls at'least two (three in the present case) trains ofgears to place one or the other-in condition for operation, according tothe position to which it is moved, and the rockers or actuators are soconnected to said members, that when the rockers or actuators areactuated by the selector each assumes one of several predetermined.positions to position its connected'or corresponding member or device.In providing the rockers or actuators with the flat faces upon theirperipheries, the engaging ends of the selector (when the latter isactuated by the controller) positively moves said rockers in onedirection. or the other, thus doing away with the necessity of employingsprings. The controller positions the selector between any pair of corresponding cam faces on the rockers, to se lect for operation theparticular train of gears to transmit the desired speed, and thenactuates the selector to condition said train for operation. Themovement of the selector to any predetermined position with reference tothe rockers or actuators is attained by moving the controller about oneaxis, and the actuation of said selector is secured by moving saidcontroller about another axis.

Having thus explained the nature of'my' said invention and described away of constructing and using the same, although with out attempting toset forth all the forms in which it may be made or all the modes of itsuse, what I claim is:

1. The combination 'with a driving element, a driven element, andvariable speed power transmitting mechanism between saidelements,comprising a plurality of trains of gears and devices for putting saidtrains in condition for operation, of a selector for positivelyactuating said devices in opposite direct-ions and movable into severaldifferent positions to select for operation any certain train vof gears.a

2. The combination with a driving. element, adriven element, andvariable speed I power transmitting mechanism between said elements,comprising a plurality of trains of gears and gear-controlling membersfor put- .ting said trains in condition for operation,

actuators and selector having coact-ing cam faces.

4. The combination with a driving elemerit, a driven element,and'variable speed power transmitting mechanism between said elementscomprising a pluralitv of trains of gears and members for putting saidtrains in condition for operation, of actuators connected to saidmembers and each having faces of varying angularity, and a selectormovable into successive registration with the corresponding faces ofsaid actuators to operate said actuators.

5. The combination with a driving element, a driven element and variablespeed power transmitting mechanism between said elements comprising aplurality of trains of gears and members for putting said trains incondition for operation, of actuators connected to said members andarranged in parallelism, said actuators having corresponding faces, thefaces on each actuator varying in angularity, a selector movable alongsaid actuators into successive registration with the pairs ofcorresponding faces on'said actuators, and means for actuating saidselector in consequence of which its engagement with said faces movessaid actuators and thereby said members.

6. The combination with a variable speed ioeaaeo selector mechanism forselecting any desired train and positively actuating said members to putsaid train in condition for orout of condition for operation.

7. The combination with a variable speed power transmitting mechanismcomprising L Y a plurality of trains of gears, and members for puttingsaid trains in condition for operation, of a selector mechanism forselecting any desired train and actuating said members to put said train1n operat1on, said selector mechanism comprlsmg a selector,

said selector, and then actuating it to operate said members.

8. The combination with a variable speed power transmitting mechanismcomprising a plurality of trains of gears, and members for putting saidtrains in condition for operation, of a selector mechanism for selectingany desired train and actuating sald members to ut said train inoperation, said selector mec ianism comprising a selector, a

' controller rotatable on axes at angles to each other connectedthereto, means by which the and a rotatable controller for positioningrotation of the controller on one axis positions said selector, andmeans by WhlCh the V rotation of said controller on its other axisactuates said selector.

9. The combination with a variable speed power transmitting mechanism,comprising a plurality of trains of gears, and members for putting saidtrains in condition for operation, of a selector mechanism connected tosaid members for selecting any desiredtrain and actuating said membersto put said train in operation, said selecting mechanism comprisingrockers connected to said members and rotatable to-assume several angularly varying positions, a selector adapted to be positioned tomove'said rockers into different positions, and means for actuating saidselector to move said rockers;

10. The combination with a variable speed power-transmitting mechanism,comprising a plurality of trains of gears, and members for putting saidtrains inv condition for operation, of a selector mechanism connected tosaid members for selecting any desired train and actuating said membersto putsaid train in operation, said selecting mechanism com prisingmovable elements connected to said members respectively, a selectormovable laterally with respect to said elements, said elements andselector having cam faces which may be selected for registration bymoving said selector, and means for-actuating said selector.

11. The combination with a variable speed power transmitting mechanism,comprising a plurality of trains of gears, and members for putting saidtrains in condition for operation, of a selector mechanism connected tosaid members for selecting any desired train and actuating said membersto put said train in operation, said selecting mechanism comprisingmovable elements connected to said members respectively, a rockingselector, said members and selector having cam faces which may beselected for registration by moving said selector lengthwise of itsaxis, and means for rocking said selector to actuate said members by theregistering cam faces.

12. In mechanism such as described, the combination with a variablespeed powertransmitting mechanism comprising a plurality of trains ofgears, of the gear-controlling members, rockers connected to saidmembers and having oppositely disposed cam faces, some of the cam faceson each rocker being angular with respect to others thereon, a selectorhaving arms to engage a pair of opposing cam faces on said rockers, andmovable to register with said faces successively, and means for movingsaid selector, and rocking it to cause its arms to engage said cam facesand rock said rockers. 18. In mechanism such as described, thecombination with a variable speed powertransmitting mechanism comprisinga plurality of trains of gears, of the gear-controlling mechanism,including a gear-train se lecting mechanism comprisinga selector and acontroller for positioning and then actuating said selector.

1 1. In mechanism such as described, the combination with a variablespeed powertransmitting mechanism comprising a plurality of trains ofgears, of the gear-control ling mechanism, including a gear-trainselecting mechanism comprising a rocking selector, a shaft therefor, anda controller operatively connectedto said shaft to move it lengthwiseand to rock it.

15. The combination with a driving element, a driven element andvariable speed power-transmitting mechanism comprisin a plurality oftrains of gears, and arrange to rotate said driven element at any one ofa number of rates of speed, of mechanism including a rotatablecontroller, and means by which movement of said controller selects andputs in condition for operation said trains of gears respectivelysuccessively to increase or decrease gradually the speed of the drivenmember.

16. The combination-with a driving element, a driven element and.variable speed power-transmitting mechanism comprising a plurality oftrains of gears, and arranged to rotate said driven element at any oneof a number of rates of speed, of mechanism including a selector,gear-controlling members positively actuated by said selector, acontatable on another axis to actuate said se-' lector and operate saidmembers.

18. The combination with a variable speed power-transmitting mechanismcomprising a plurality of trains of gears, of controlling members forsaid gears, camfaced actuators connected to said members, a selectormovable into registration with the corresponding cam faces of saidactuators, a longitudinally movable shaft on which said selector issecured, said shaft having a rack, and a controller having a pinionmeshing with said rack to move said shaft longitudinally and therebyposition said selector.

19. The combination with a variable speed power-transmitting mechanismcomprising a plurality of trains of gears, of controlling members forsaid gears, camfaced actuators connected to Said members, a selectormovable into registration with the corresponding cam faces of saidactuators, a longitudinally movable shaft on which said selector issecured, said shaft having a rack, a controller having a pinion meshingwith said rack to move said shaft longitudinally, and thereby positionsaid selector, and means by which said controller and shaft arerotatable about a common axis to actuate said selector and, thereby saidactuators.

20. The combination with a variable speed power-transmitting mechanismcomprising two independent sets of change gears and an intermediate setof fixed gears, of a selector movable into different positions, andmeans for shifting said sets of change gears controlled and actuated bysaid selector.

21. The combination of a variable speed power-transmitting mechanismcomprising two independent sets of movable change gears, and anintermediate set of fixed gears, gear-shifting devices, adapted tolocate said sets of movable gears in different relations to vary thetransmitted speed, and a selector having means for controlling andactuating said gear-shifting devices simultaneously if desired.

22. The combination with a driving element, a driven element, and avariable speed power-transmitting mechanism comprising a plurality oftrains of gears including two sets of change gears and an intermediateset of fixed gears, and members,each controlling one of said sets ofchange gears and movable to a plurality of predetermined posi tions toput in condition for operation a plurality of said trains of gears, of aselector mechanism for positioning saidsmembers, comprising a selectormovable successively into as many positions as there are trains ofgears, and means controlled thereby for positioning said members 'tocause all of members, comprising a selector movable sue-- cessively intoas many positions as there are trains of gears, actuators connectedrespectively to said members, said actuators each having a vplurality offaces equal in number to said gear trains, and a controller forpositioning said selector adjacent any corresponding pair of said facesand for actuating said selector to engage said faces and thereby actuatesaid actuators to condition the corresponding train of gears foroperation.

24. The combination with a driving element, a driven element, and avariable speed power-transmitting mechanism comprising a plurality oftrains of gears, a member movable to a plurality of predeterminedpositions to put in condition for operation said trains of gearssuccessively, and a selector mechanism comprising an actuator connectedto said member and having relatively angular fiat faces, aselectormovable into operative relation to said faces successively, andhaving a complemental flat face to coact therewith, and means foractuating said selector after it has been positioned.

25. The combination with a driving element, a driven element, variablespeed power-transmitting mechanism between said elements comprising aplurality of trains of gears, and selecting mechanism for putting saidtrains of gears in conditionfor operation successively comprising acontroller and one or more gear-controlling members positioned thereby,of mechanism under the control of said controller for disconnecting saidpower-transmitting mechanism from,

said driven element. 26. The combination with a driving ele ii ment, adriven element, variable speed power-transmitting mechanlsm between saidelements comprising a plurality of trains of gears, and selectingmechanism for putting said trains of gears in condition for operationsuccessively comprising a controller and one or more gear-controllingmembers positioned thereby, of mechanism under the control ofsaidcontroller for disconnecting said power-transmitting mechanism fromsaid driven element, and comprising a clutch and clutchreleasingmechanism actuated by said controller.

In testimony whereof I have affixed my signature, in presence of twowitnesses.

JAMES HARTNESS.

Witnesses:

Gr. W. CLACE, J. W. WALKER.

